U.S. 31 Stars Flag, California joins the Union.

U.S. 31 Stars Flag Commemorating California's Admission into the Union, September 9, 1850.
This period example 31 stars U.S. flag was made to indicate the admission of California as the 31st state and would remain accurate until the admission of Minnesota on May 11, 1858, a period of 7 years, 8 months and 2 days.

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